avcodec/h264: add avx 8-bit 4:2:0 chroma h intra deblock/loop filter

~1.10x faster (69 vs. 63 cycles) compared to mmxext function

libavcodec/x86/h264_deblock.asm

@@ -1223,6 +1223,15 @@ cglobal deblock_v_chroma_intra_8, 4, 5, 8, pix_, stride_, alpha_, beta_
     movq [pix_q], m2
 RET
 
+cglobal deblock_h_chroma_intra_8, 4, 6, 8, pix_, stride_, alpha_, beta_
+    CHROMA_H_START_XMM r4, r5
+    LOAD_8_ROWS PASS8ROWS(pix_q - 2, r4 - 2, stride_q, r5)
+    TRANSPOSE_8x4B_XMM
+    CHROMA_INTRA_BODY_XMM
+    TRANSPOSE_4x8B_XMM
+    STORE_8_ROWS PASS8ROWS(pix_q - 2, r4 - 2, stride_q, r5)
+RET
+
 %endmacro ; DEBLOCK_CHROMA_XMM
 
 DEBLOCK_CHROMA_XMM avx

libavcodec/x86/h264dsp_init.c

@@ -322,6 +322,7 @@ av_cold void ff_h264dsp_init_x86(H264DSPContext *c, const int bit_depth,
             c->h264_v_loop_filter_chroma_intra = ff_deblock_v_chroma_intra_8_avx;
             if (chroma_format_idc <= 1) {
                 c->h264_h_loop_filter_chroma       = ff_deblock_h_chroma_8_avx;
+                c->h264_h_loop_filter_chroma_intra = ff_deblock_h_chroma_intra_8_avx;
             } else {
                 c->h264_h_loop_filter_chroma       = ff_deblock_h_chroma422_8_avx;
             }